. Uprising turns violent
Syrian protestersImage copyrightGetty Images
Pro-democracy protests erupted in March 2011 in the southern city of Deraa after the arrest and torture of some teenagers who painted revolutionary slogans on a school wall. After security forces opened fire on demonstrators, killing several, more took to the streets.
The unrest triggered nationwide protests demanding President Assad's resignation. The government's use of force to crush the dissent merely hardened the protesters' resolve. By July 2011, hundreds of thousands were taking to the streets across the country.
Opposition supporters eventually began to take up arms, first to defend themselves and later to expel security forces from their local areas.
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. Descent into civil war
Grieving Syrian man and injured girlImage copyrightGetty Images
Violence escalated and the country descended into civil war as rebel brigades were formed to battle government forces for control of cities, towns and the countryside. Fighting reached the capital Damascus and second city of Aleppo in 2012.
The conflict is now more than just a battle between those for or against President Assad. It has acquired sectarian overtones, pitching the country's Sunni majority against the president's Shia Alawite sect, and drawn in neighbouring countries and world powers. The rise of the jihadist groups, including Islamic State, has added a further dimension.